Learn About Plastic Moulding And Plastic Moulding Techniques

Posted on July 19, 2008
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Approximately 30% of all plastic products in the world are produced by an injection Plastic Moulding process. Within this another 30% are produced using a custom injection Plastic moulding technology. There are basically six steps involved in the normal injection molding process. The first step is the clamping of the mould, the clamping unit makes for one of the three units of the molding machine. The other two being the injection unit and the mold, once the clamping unit holds on to the mold, the molten plastic is injected into the mold by the injection unit. The plastic is fed in the form of tiny pellets onto a hopper. These are then allowed into a cylinder where they are heated into a molten state and injected into the mold. The steps that follow are referred to as dwelling phase. It basically involves making sure all the cavities in the mold are fully filled. The mold is then allowed to cool with the clamping intact. Finally the mold is opened and the component is ejected out. The biggest advantage of plastic injection Plastic Moulding is the cost factor of the produced parts, especially when you need large number of parts. The disadvantage is the cost of manufacturing the molds; a simple injection plastic moulding can cost you $3000 while the bigger complex ones can run into several hundreds of thousands.

Rapid Prototyping: Rapid Prototyping is the process of automated manufacturing of physical components using solid freeform fabrication. They are used in a wide range of applications, everything from medical to fine art. Rapid Prototyping machine works by taking virtual models from software and then converting it into extremely thin, horizontal cross-sections and then goes onto create each of the cross-section in physical space in a cyclic manner until the model is completed. Rapid Prototyping is a WYSIWYG process in which the virtual model bears identical resemblance to the finished physical model. Additional fabrications allows the machine to lay down layers of sheet, liquid or powder material and build up a series of cross-sections These layers are finally automatically fused together to render the final product. The main advantage of rapid prototyping is the ability to create any shape no matter how complex the geometry is. The commonly used data interface between the machine and the software is the STL format. It works by approximating the geometry of a part using triangular facets, smaller the facets higher will be the surface quality. The word “rapid” is used relative top conventional methods which take days to construct a model depending upon its complexity. Rapid prototyping can create the model within a few hours, though it is highly dependent of the type of machines and the size of the model. There have been several new technologies available for rapid prototyping including Fused Deposition Modeling, Selective laser sintering, 3D printing, and Electron Beam Melting.

Prototyping Injection Plastic Moulding is a specialized method of combining traditional plastic injection molding. CAM software are able to combine rapid tooling and plastic injection molding in order to quickly create small quantities of any thermoplastic part.

Compare Digital Or Cassette Phone Recorder

Posted on July 18, 2008
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If you’ve ever seen those celebrity match-ups with Superman vs Batman and the like, digital telephone recorders vs cassette telephone recorders will sound familiar. If not, you’re about to see a non-celebrity match-up of two recording devices. Not the most exciting lineup, but Cher and Madonna were unavailable.

Recording Time:
In our first contest, we’ll compare the recording capacity of a cassette vs digital phone call recorders. It’s a knockout for digital, which can hold dozens or hundreds of conversations. Cassette, on the other hand, staggers under two hours of conversation on a 120-minute cassette (60 minutes per side).

Duplication:
Ouch. Need to copy a cassette? First, very carefully preserve your master, and record only from the master. Copies of a copy will sound horrible, and the master will wear with time. Digital copies? No problem. Duplicate the original file endlessly with no loss of quality.

Sound Quality: You may not notice much difference in the quality between cassette and digital, actually. The cassette may leave a slight hiss on the recording, but some cassette recorders have pretty good quality. Let’s call this one a draw.

Size: If you need to carry your cassette phone call recorder, get a microcassette, which is the smallest available. On the other hand, you could go digital and get a recorder the size of a cigarette lighter. Oooh. Another one to the digital side, though admittedly size is probably not a huge factor for most people.

Archiving: This is the knockout round for digital. If you’re planning to archive your cassette recordings, you should set aside a lot of room for the tapes. Archiving digital files is simply a matter of setting up a new folder on your computer. Pow.

It looks like the match goes to the digital telephone recorders. Seriously, if you are currently using a cassette recorder and want a lateral transfer, that’s fine, but if you’re upgrading, you’ll want to switch to digital for a number of reasons.

Metal Casting Process And Casting Process Techniques Described

Posted on July 18, 2008
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There are various Casting Processes being implemented now days. The oldest amongst them is sand casting and can be described as follows:

Sand Casting: Sand casting involves formation of mold from a mixture of sand and to pour a casting liquid, most probably, a molten metal into mold. The metal is then allowed to solidify and the removal of mold, takes place. Sand molding consists of two types: green sand method and air set method. The first one consists of mixture of clay, moisture, silica, and many other additives. The second one consists of mixture of dry sand and other materials, not moist clay. They are mixed with the help of a quick curing adhesive. The collective use of these materials is called ‘air set’.

At times, there is temporary plug placed to pour the fluid which is to be molded. Air-set molds usually form molds consisting of two parts-the bottom and the top. The mixture of sand gets tamped down after its addition. It does not generate any by-product. After the solidification and cooling of metal, the mold gets usually destroyed. This is because its removal involves a lot of breaking and cracking. The casting accuracy depends a great deal on the sand and the process of molding used. Castings composed of green sand result into formation of rough texture on casting surface, and this characteristic makes them easily recognizable. Air-set molds produce smoother castings.

Many times, the process results in losing components of the sand mixture. It is possible to reuse green sand by the way of adjusting the composition to get the lost additives and moisture replenished. The entire pattern itself is eligible to be reused for producing novel sand molds. The method of reuse can be continued for an indefinite period. In 1950, casting process got automated partially. They have been in great demand for developing production lines since then.

Spin Casting: Spin Casting is better known as Centrifugal Rubber Mold Casting (CRMC). It implies utilization of centrifugal force for producing castings out of rubber mold. As a customary practice, a mold having shape of a disc gets spun through its ‘central axis’ at a pre-decided speed. The material used for casting is usually thermoset plastic in the liquid form or a molten metal. It gets poured into the mold through the opening at its centre. Corresponding to the solidification of metal, or the setting of thermoset plastic, the spinning of the filled mold takes place.

Normally, organic rubber or vulcanized silicone is used as a mold-making substrate in spin casting. Vulcanization takes place in the middle of process of mold-making. After the successful completion of vulcanization process, venting and gating must be undergone by the mold. This implies carving of channels for ensuring proper material flow and air during the course of casting. A scalpel or knife is used to carry out the above two processes. The mold complexity is directly proportional to the time required in implementation of venting and gating.

Iron Scraps Information And The Information You Need On Iron Scraps

Posted on July 18, 2008
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Iron Scraps can be referred to as products made out of melted iron molecules. These molecules are, first, poured into mold and allowed to cool. They are then extracted. The Iron Scraps properties depend a great deal on the foundry practice. They also depend on the cooling rate. Iron contains huge carbon concentrations. This content facilitates melting, simplicity of casting, and machining. Iron casting designs have a great variation owing to the property of iron to resist shrinkage during the process of cooling. The end product attains a great reputation for its strength and durability. Tensile strength ranges between 20,000 psi and over 60,000 psi. The values of hardness (without heat treatment) range between 100 and 300 BHN.

Some factors need to be considered while buying iron castings. The first thing on the agenda should be, checking the quality of foundry used in products and procedures. This should be done because foundry practices determine the casting properties. The consumer might have a tough time in finding the apt one. Secondly, the concentration of carbon should be looked into. The percentage of carbon commonly ranges between 2.5 and 4%. An addition of even 0.1% would cause the tensile strength to decrease by around 2700 psi. Casting procedures differ from foundry to foundry.

Green sand molding is the most commonly used type of casting. Normally, small and medium sized products are produced using this type of casting. Shell molding is preferred for bigger applications. Shell molding facilitates cooling of the mold containing heated metal. This process gives a better finishing to the final product as compared to all the other processes. Centrifugal casting is used for producing big cylinders and pipes. Both, producer and consumer would get highly satisfied if a proper blend of correct casting process and reputed foundry is made.

Iron Scraps are utilized extensively in machinery, automotive, and agricultural industry. Parts such as turbine and pump housings, dynamometer bases, compressors are made out of iron castings. Majority of manufacturers have the caliber to go for high and low production outputs. They are also entitled to go for short order runs. There are standard prototypes ensuring customer satisfaction and accuracy. Some manufacturers provide finishing services like galvanizing, painting, and machining as well. In general, iron castings include alloy casting, ductile castings, and malleable castings. There are some terms relating to iron castings. They need to be known in order to get a fair idea of iron.

Brinell Hardness Number (BHN): It can be defined as the method used for measuring the hardness of iron. For Iron Scraps, a metal ball of 3000Kg is put on a flat iron piece. After the removal of ball, indentation observed is recorded. This measurement indicates the value of hardness.

Tensile Strength: Tensile strength can be defined as the quantity of bending and stretching undergone by a material before tearing or breaking. Here the metal is iron.

Modulus of Elasticity: It can be defined as the ratio of stress to strain. This value determines the elasticity as well as the stiffness of the concerned material.

Rapid Tooling, Rapid Manufacturing, Rapid Tooling Forum

Posted on July 17, 2008
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Rapid Tooling can be described as an ‘Additive Fabrication Technique’ to manufacture solid objects through the chronological delivery of material and/or energy to precise points in the space for producing that part. At present, the practice of controlling the process of manufacturing with the help of computer by making use of mathematical model that has been created through the computer’s aid is being followed. Rapid manufacturing, if done with the help of Parallel Batch Production is capable of providing a huge advantage in terms of cost and speed in comparison with alternative techniques of manufacturing like die casting or Plastic Injection Molding.

Origin: Rapid Tooling process was first demonstrated at The AUTO FACT show. The venue was Detroit, MI. The year was 1987. This creation is attributed to 3D Systems Company. The technologies available now are inclusive of processes such as Laminated Object Manufacturing, Shape Deposition Manufacturing, and Selective Laser Sintering.

The present scenario: Rapid Tooling might involve replacement parts, custom parts, series production, or Short Run Production. This process can be referred to as Rapid Prototyping only if the use of the part is for development. Rapid Manufacturing carried out for big products with Layer-based Manufacturing from composite materials, plastics, or metals is widely used for numerous industrial applications pertaining to aerospace (Boeing) and military (MPH-Optomec) sectors. Micro system applications and small products are well known in medicines, sensor technologies (micro TEC), and diagnostics. Batch production regarding tiny parts by techniques of rapid manufacturing like RMPD give vent to advantages related to time and cost.

Now days, collectibles, consumer products, orthodontics, dentistry, jewelry, motor sports, and automotives are being experimented with rapid manufacturing. Amazing results are expected in future. The world economy is becoming competitive day by day. Manufacturers are facing the challenge to deliver novel customized products faster than before for meeting customer demands. A late delivery or development might could mean failure of business. Rapid manufacturing has been devised with the objective of shortening the production cycle and design, and promising to revolutionize the age-old manufacturing procedures.

The initial Rapid Tooling process: Before starting with the construction of product, a prototype or sample is required quite often as a portion of design cycle, for allowing evaluation, testing, or demonstration of proposed product. This process is iterative, as a chain of prototypes gets built up. These prototypes can then be used for testing various options.

Rapid Manufacturing is also inclusive of rapid application of tools needed for production on a large scale, like jigs, dies, and specially shaped molds. Several Layer manufacturing Processes are being developed now, by making use of a wide range of materials. Parts produced so far have proven to be steadily durable. The size has also been increasing. Due to all these successes, layer manufacturing is the most sought after technique for fabricating the parts for functional prototypes as well as production tools. The process of applying layer manufacturing for making components utilized in production can be called Rapid Tooling. It is being applied to investment casting, injection molding, and many processes related to mold casting.

Phone Recorder Used As Spy Gadget

Posted on July 13, 2008
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A phone recorder can be a spy gadget used for secretly recording both sides of conversations made on phones in your home. An individual can use this spy equipment for spying, keeping track of child and spouse’s activities, future references, telephonic interviews, etc. For operating a phone recorder, you simply need to plug the recorder in the any available wall jack and start recording phone conversations made from any phone in the house. The recorder starts recording automatically once the receiver is picked up.

Benefits of phone recorder

Recorded proof: It can serve as a full proof evidence of the actual happenings, in case of any doubt or suspect. Companies can even use the recording details as evidence in a court case to resolve false claim litigations and save millions.

Repeated playback: With a phone recorder, a call can be played back any number of times. Thus, you can hear the conversation without noise and beeps repeatedly. You can also use this spy equipment to store messages, which can be later retrieved from the answer machines or voicemail.

Keeps a check: With the recorder, you can easily keep a watch on all the telephone activities of your child and spouse. If you suspect your spouse is cheating on you, then use this spy gear and learn about the people they talk to. You can also keep a check on your child and know if they are involved in any hideous activity.

Storage: A phone recorder either utilizes tapes or digital technology to record and hold the conversations. It allows you to record hours and hours of information. The recordings from this spy gadget can be later reviewed whenever required for varied purposes like future reference, investigations, training, etc.

Buy Affordable Phone Recorders from TelephoneCallRecorder.com

TelephoneCallRecorder.com is a leading spy store and offers quality, reliable, technically superior and affordable telephone call recorders. Our recorders are very easy to operate and require no technical knowledge for set-up, just connect it to the phone jack and record any conversation without beeps, clicks and noise. These spy gadgets are ideal to work on any regular home phone, cordless phone and cell phone. Visit us today and enjoy our quality products.

Blu Ray For New Movies Will Replace Dvd With Ray Disc

Posted on July 11, 2008
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You may have heard of some people paying anywhere from $2,000 to $50,000 for the PlayStation3 when it first came out. Since there was a limited number, people went crazy for the new technology. Now, those who have patiently waited can buy a PS3 for just $399 and still enjoy all the benefits.

The new Blu Ray HD craze will likely run its course in much the same way. Early buyers paid the penalty of having a less advanced machine, while newer Blu Ray players came out, allowing firmware upgrades via the internet and more interactive capacity. Waiting may be the best way to save money, but there are some great options now for the eager buyer as well.

ray hd
Now that the bidding war is over between Sony and Toshiba, there is good news on the horizon for consumers. By the time Christmas rolls around next year, those looking to buy a Blu Ray HD player will likely see many deep discounts in an effort to inspire people to upgrade their systems to ray hd.

Of course, they will be much more difficult to find at that time, too. This summer Sony is expected to unleash its next generation high-definition blu ray player that includes internet connectivity, faster memory, more interactivity and more advanced menu options. The best way to buy cheap is simply to wait.

hd dvd blu ray
Next we’ll look at where to find cheap Blu Ray HD discs. Since the cost of manufacturing BR discs is so high (just a blank BD-R costs $25!), the cheapest way to buy is to look for all the deals from various retailers.

Since the technology is so new, you can bet retailers will be marking down prices like crazy to offset the “start-up costs” of changing over from DVD to High-definition Blu Ray DVD. For example, Amazon.com has “Buy-2-Get-1-Free” Blu Ray sales right now. Similarly, Circuit City and Best Buy are dropping many titles down to $19.99 for a limited time!

You don’t have to spend over $1,000 on the Sony VAIO to get a laptop that plays/rips Blu Ray discs. In fact, Dell has released the blu ray format equipped Inspiron 1525 laptop for as low as $879.

blu ray format
If you’re looking to get into Blu Ray HD DVD authoring, then you may want to wait until prices come down. The blank discs alone will run you $25 and the burners take 45 minutes or more. You’ll also need software to bypass the advanced copyright protection.

For now, eager consumers may see higher prices but like anything, prices will drop as the demand goes down and technology finds cheaper production modes.

Solar Technology For A Solar Hot Water System

Posted on July 11, 2008
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The cost of oil and gas is steadily rising and the world is being warned about another energy crisis. Solar energy may be the solution consumers are looking for. These systems use sunlight instead of gas or electricity to heat water for your home.

This is one of the most cost-effective renewable energy systems and can significantly reduce your utility bill. In this article, we’ll detail how solar thermal energy works and how you can use it to save money.

solar technology
Solar thermal energy is the heat that can be gathered from solar power without the use of photoelectric cells. It is a form of energy that can be transferred into water and stored in insulated containers and kept heated constantly by the sun, while retaining energy overnight. They are also used to heat water and homes.

Some thermal energy is used to superheat water in massive solar power plants that use steam based turbines to generate electric power. This is very environmentally friendly because no emissions are produced when using solar thermal systems.

The collection of solar thermal energy is usually done through a panel or a series of panels which pump water. These panels are commonly seen in a home’s hot water system and can cut consumption of energy used for heating water by more than half.

solar power system
Various collectors, such as solar hot water panels, are commonly used to generate solar hot water for domestic and light industrial purposes. Solar thermal energy is used in architecture and building design to control heating and ventilation in both active solar and passive solar designs.

There are a variety of cost efficient solar power system available to homeowners, so you have to choose which best meets your needs. A closed loop solar thermal system supplements heat to your hot water tank.

This system will cost about $4,600 US to install, but prices are steadily decreasing. Another popular closed loop system is called a drainback. The solar pool heater, which is an open loop system, is a very practical product. It’s called this because water circulates back into the pool since it’s an open system.

solar water
A solar blanket, while not technically a wind and solar power system, is an economical way to retain and increase the heat of your pool. Many governments are offering rebates to consumers who buy environmentally friendly products.

Solar thermal power has become a viable alternative to coal, oil and nuclear energy. As solar power products advance and become mass produced, the cost to the consumer continues to decline. This is just one way to conserve the world’s energy for the future.

Prototyping Information History And Prototype Machining Development Information

Posted on July 9, 2008
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Prototyping Information is a revolutionary and powerful technology with wide range of applications. The process of prototyping involves quick building up of a prototype or working model for the purpose of testing the various design features, ideas, concepts, functionality, output and performance. The user is able to give immediate feedback regarding the prototype and its performance. Rapid prototyping is essential part of the process of system designing and it is believed to be quite beneficial as far as reduction of project cost and risk are concerned.

Rapid prototyping is known by many terms as per the technologies involved, like SFF or solid freeform fabrication, FF or freeform fabrication, digital fabrication, AFF or automated freeform fabrication, 3D printing, solid imaging, layer-based manufacturing, laser prototyping and additive manufacturing.

History of Rapid Prototyping:

Sixties: The first Prototype techniques became accessible in the later eighties and they were used for production of prototype and model parts. The history of rapid prototyping can be traced to the late sixties, when an engineering professor, Herbert Voelcker, questioned himself about the possibilities of doing interesting things with the computer controlled and automatic machine tools. These machine tools had just started to appear on the factory floors then. Voelcker was trying to find a way in which the automated machine tools could be programmed by using the output of a design program of a computer.

Seventies: Voelcker developed the basic tools of mathematics that clearly describe the three dimensional aspects and resulted in the earliest theories of algorithmic and mathematical theories for solid modeling. These theories form the basis of modern computer programs that are used for designing almost all things mechanical, ranging from the smallest toy car to the tallest skyscraper. Volecker’s theories changed the designing methods in the seventies, but, the old methods for designing were still very much in use. The old method involved either a machinist or machine tool controlled by a computer. The metal hunk was cut away and the needed part remained as per requirements.

Eighties: However, in 1987, Carl Deckard, a researcher form the University of Texas, came up with a good revolutionary idea. He pioneered the layer based manufacturing, wherein he thought of building up the model layer by layer. He printed 3D models by utilizing laser light for fusing metal powder in solid prototypes, single layer at a time. Deckard developed this idea into a technique called “Selective Laser Sintering”. The results of this technique were extremely promising. The history of rapid prototyping is quite new and recent. However, as this technique of rapid prototyping has such wide ranging scope and applications with amazing results, it has grown by leaps and bounds.

Voelcker’s and Deckard’s stunning findings, innovations and researches have given extreme impetus to this significant new industry known as rapid prototyping or free form fabrication. It has revolutionized the designing and manufacturing processes.

Though, there are many references of people pioneering the rapid prototyping technology, the industry gives recognition to Charles Hull for the patent of Apparatus for Production of 3D Objects by Stereolithography. Charles Hull is recognized by the industry as the father of rapid prototyping.

Present-day Prototype Machining: Today, the computer engineer has to simply sketch the ideas on the computer screen with the help of a design program that is computer aided. Computer aided designing allows to make modification as required and you can create a physical prototype that is a precise and proper 3D object.

Selective Laser Sintering - SLS Prototyping Information

Posted on July 8, 2008
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Rapid Prototyping or SLS is said to be a free-form manufacturing technology which is developed by 3D systems. SLS is a method of layered manufacturing which creates a solid 3D object by blending powdered substances along with carbon dioxide. In other words SLS is one of the famous mechanisms of prototyping in which a laser beam carefully sinters or fuses the powdered substances such as elastomer, nylon etc. A thin layer of that powdered substances is being laid down and the laser sketches on the layer sintering together the elements hit by the laser. SLS can provide a persons manufacturing company with most important perimeter by producing metal or rapid plastic prototyping which narrowly matches their molded complements.

Stereolithography V/S Selective Laser Sintering: One of the foremost benefits of Selective Laser Sintering over Stereolithography is that it constructs prototypes in powered materials such as nylon etc. It is likely to create structurally useful parts like functioning springs, living hinges and snap fit components along with nylon substances by utilizing Selective Laser Sintering. This procedure is actually very easy as there is no need of tooling or molding involved. The nylon substance utilized in SLS can easily be tapped, drilled and machined similar to those utilized in Stereolithography or SLA. These substances are fragile as they are curved with Ultra Violet light and created with liquid photopolymers.

Since it has been introduced by DR Carl Deckard in the year 1989, this Rapid Prototyping technology has become one of the most recognized and utilized procedures for product development and rapid prototyping in most of the manufacturing industries. SLS technology has also become one of the most trusted and reliable forms of rapid prototyping due to its structural importance. SLS is generally helpful when a particular design has to be customized or is complex and requires being short run or functional production.

Procedure: In the procedure of SLS or Selective Laser Sintering, three dimensional parts are formed when an infrared laser beam fuses or sinters powdered substances. The ultimate object is being formed by continually sintering or fusing those thin layers by utilizing the infrared laser beam. This particular procedure is also known as additive manufacturing, creating parts which regularly enhances in size until it reaches the arranged size. These rapid prototypes are formed directly from the STL file acquired from three dimensional CAD models.

One of the most important features of Selective Laser Sintering is how functional and durable the substances are. These substances normally include versions of new DuraForm glass-filled, which is a nylon based substance that creates functional and highly durable plastic prototypes. Some of the other substances available with SLS include LaserForm, Flex Plastic for elastomeric and rubber like parts that create metal prototypes.

Benefits: Developments and research has been making progress in order to bring innovative SLS substances to the manufacturing market. These substances are like which they need no post processing methods at all after creating and this offers a different advantage over SLA or Stereolithography. However, this does not mean that these substances cannot be developed. All these SLS substances can be completed in many methods. They can be machined, painted, tapped, drilled and even plated. This allows for a superior grade of manifestation to these substances therefore giving the users a limitless potential to utilize these substances.

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